Gkain-door-forcing device



W. H. McGANN.

GRAIN DOOR WBClNG DEVICE.

Beissued July 4, 1922.

APPLICATION FILED JUNE 1. 1922.

I NVENTOfi. W. H. M 6mm.

UNITED STATES WILLIAM H. MoG-ANN, or MINNEAPOLIS, irIivnnsorA.

GRAIN-DOOR-FORGING. DEVICE.

filed June 1, 1922. Serial No. 565,565.

, To all whom it may concern:

' Be it known that I, WILLIAM H. MOGANN, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements in Grain-Door-Forcing-Devices; and I do herebydeclare the following to. be -afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and'usethesame.

y invention has for its object to provide a simple and eflicient graindoor forcing device; and to such ends, generally stated, the inventionconsists of the novel devices and combinations of devices hereinafter described and defined in the claims.

The invention is illustrated in the accompanying drawings wherein likecharacters indicate like parts throughout the several views.

Referring to the drawings:

Figure 1 is a fragmentary section of a body of an ordinary box car andgrain door and shows the improved forcing device in side elevation,applied in working position;

Fig. 2 is a horizontal section taken on the line 2-2 of Fig. 1; and I rFig. '3 is a vertical section taken-through the forcing device on theline 3-3 of Fig. 2, the same being removed from working position. 7

The numeral 4' indicates-the floor structure, the numeral 5 one of theside sills, the numeral 6 one of'the side door posts, and thenumeral 7the grain door of an ordinary box car. 7

These grain doors as usually. constructed, are made of wood and areusually nailed to the inner sides of the door posts in a position tospan the door opening. When grain, or like material, indicated at y isloaded in the car against the so-called grain door, the latter can beopened only by forcing the same inward, or by breaking the lumber of thegrain door. The customary practice is to break through, or split up theboards of' the grain door so that-there is a very great loss of lumberin the use of these grain doors, and moreover, the breaking of the graindoor is often a quite tedious, diflicult,

Specification of Reissued Letters Patent. 'Reissued July 4 1922 OriginalNo. 1,400,447, datedDecember 13, 1921, Serial No. 407,052, filed August30, 1920.

15,306, dated March 14, 1922, Serial No. 535,229, filed February 6,1922.

Reissue No. This application for reissue or unsatisfactory operation,even when the proper tool, such as a crowbar, or the like, is available.

Because ofthe' scarcity of pine lumber, it Is becom nga more commonpractice to make these grain doors of cheap grades ofhard lumber, andthis increases the difliculty of breaking the grain doors open by thecustomary means, and also increases the desirabil- Ity of saving as muchas possible of the lumber of the grain doors.

The device which I will now describe and which I have termed a graindoor forcing device, accomplishes the objects above indicated.Preferably this. forcing device is constructed and arranged as follows:

The numeral 8 indicates a very strong cast metal clamp of approximatelyC-shaped formation, but having parallel, vertically spaced jaws 8 and 8that are of such size and so spaced that they will embrace the floorstructure and side sill at. the door opening with the undersurface ofthe jaw 8 resting upon the floor structure, as best shown in Fig. 1.

The lower jaw 8 is providedwith a clamping screw 9 working with threadedengagement therethrough, and provided at its upper end with aswiveled'clamping head 10 that is adapted to bear directly against theundersurface of the sill 5. At its lower end, the screw 9 has a handpiece 11, by means of which it may be rotated, to very securely anchorthe clamp 8 against the side sill and floor structure with its upper jawin the immediate vicinity of the lower transversely central portion ofthe grain door.

I The upper end portion of the clamp 8 is provided with laterally spacedupstanding flanges 12, in which is journaled. a short cross shaft 13provided at its central portion with a spur pinion 14 keyed, 'orotherwise, rigidly secured thereto, for rotation therewith. The numeral15 indicates a thrust plunger which stands in an oblique position inrespect to the grain door, is located directly under the pinion 14, isprovided with rack teeth with which'said pinion meshes, and is mountedfor straight line sliding movement in keepers 16 formed on the inclinedupper h p Fig 1 and 2.:-

with "sprin wheels 18V; I "Whert the 25 Portion o f'sid pump 8. At innerend '5 the plunger is provided with ahead 17., the operati'x :faoe ofwhich isob'liqiiegto the grain door and extends downward fro'msaidplunger; so that edge will. engage with the extreme 'p' "t oft graindoor-'7 When thelclamp isyappliec rred arrangement, the shaft 'cl ediwith tWo ratehet dlyfi'seoured thereto; one'on each-side OfthB'LPiD'iOHretaining dogs 19 pivotedflto the flanges 12 normally engage therespective: ratchet Whee1s1'8. it e The "numeral 20" "indiittes "51' 10mg, a for engageable I forcing shown in Figs. '1

oscillated, the pi I wardagainst powerful aet forcedsga, "st he will thedoor open er melt I door ope ingg pring ressed and e lever pivot-allysha t' -ztnd having it I on sail ratchet wheel. 4; i v I 9 a box earWith its upper portion exposed in ontheiupperportio ofsaide1a1r1pformove ..ment against a grain'jdoor' appliedin the imanually operated" power tiplyin g' device applied to said @olamp andoperative on said plunger to force the same against a g'rain door, thesaid plunger: being-mounted for" oblique, movei and having a dependinghe'ztdflt its a door;

parallel jaws, then per 1' to i being In fit ournailed tothe uppe andhaving a; spur sitid pi'rn oper tive o lever, I p

havingdr'iYing' v eht 1861.1 the the door opening, a thrust plungervmounted" "end fordirect engagement withathe I p in door fo'rbingdevioecom-prising. i an approximately ,C-shaped clamp having the device inposition, means mounted in said clamp adapted to be moved relativelythereto into engagement with the car door, and manually operated meansfor moving 5 said last named means.

7. A grain door forcing device having in combination, a member adaptedto engage the car sill, means connected to said member to hold the samefirmly in position, means mounted on said member to move relatively 10thereto to engage the car door, and means for operating said last namedmeans.

In testimony whereof I aflix my si ature.

WILLIAM H. MoG NN.

